While you will not see this code in all vehicles, it's pretty standard in those with the code. Cars like Ford, Jaguar, Mercedes tend to have this code. These kinds of codes are known as manufacturer-specific error codes.
When you have this code, it mostly means there is an issue with the PCM or EVAP system. The PCM or ECM is the engine control module. In my experience of auto mechanics, this code will signal that there is excessive vacuuming going on in the fuel tank. The tank is monitored by the PCM. So, when the PCM monitors the fuel tank and finds out too much vacuum, it will show this error code.
I know it's a bit confusing to understand if you aren't accustomed to auto-mechanics. However, straying from all those theoretical stuff, let's get in-depth into the practical part of this issue.
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Causes and symptoms of this P1450 code
Well, something that may reassure you with this error code is that it doesn't have any effect on the drivability of your car. You will not face any problems while driving even if the problem persists. However, that doesn't make this problem negligible. Now, how do you know you have this issue?
There are typically two symptoms of this error P1450 code.
- The first and most common symptom is that the check engine light will come on. Although this can happen for many reasons, you can't be certain that this is the one causing the problem.
- Another rare symptom of this is a delay in starting up the engine. This happens after your fill the tank so, it's not something you will face that often.
Since the error doesn't affect your drivability, it's not a major or serious issue. However, you don't want to ignore it either, especially if the check engine light bothers you a little. So, it's essential to know the causes for this problem.
There are quite a lot of causes for this problem to happen. Some of them are as follows –
- When the vent solenoid or the evaporative emission canister gets any obstruction, you will face this error.
- A defect in the connecting hose can lead to hindered movement of fuel to the evaporative emission from your fuel tank. This code can be an indication of that as well.
- If the pressure sensor of your fuel tank turns out to be damaged or faulty, you will face this error.
- Sometimes your fuel filter cap can get stuck, which obstructs the vacuum relief.
- Faulty wiring and connectors can also raise this problem.
- If you, by chance, overfilled the fuel tank, it can turn the charcoal canister faulty. That results in this error of fuel tank vacuum.
As you can see, there are several causes to the problem. Luckily there are some simple repairs to them as well. Let's go through them quickly.
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How to fix the error
The repair to this error mostly depends on the diagnosis of the problem. So, you have to rely on checking up on all the causes that I discussed earlier. You have to begin with checking any blockage on the EVAP canister and vent solenoid.
Then you can check the hose, wires, connections, filter cap, and so forth. Also, checking up on the pressure sensor of your fuel tank is essential. Once you check them, you can proceed with the following fixes.
- If there are blockages in the canister or vent solenoid, you have to remove them. For the hoses, you can replace them if removing the blockage doesn't work.
- You can also try replacing the fuel filler tube if you find that faulty. You can also opt for repairing it, but that might not work in most cases. So, replacing is a better option.
- If you have overfilled the fuel tank, you may need to replace the charcoal canister to fix the error code.
- As for the wiring connections, it's better to change any damaged wires you may have in the connection.
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To sum it up, the P1450 isn't that big of a deal, and you don't have to lose your sleep over it. But since it's a problem with your car, you can't ignore it either. As a technician, I would suggest fixing the issue as quickly as you can.
Simon graduated with a Mechanical and Electrical Engineering Degree. He has over 20 years of servicing experience in both Japanese and German car dealerships. He now acts as a freelance mechanic’s instructor for local schools.